JP2007210218A - Liquid supply equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide liquid supply equipment having a plate material which can extend its lifetime by minimizing damage on the occasion of liquid supply to the utmost. <P>SOLUTION: In the liquid supply equipment having a rotary screen device 200, a screen 202 has a cylindrical base layer 202a which has holes formed in the peripheral surface, a protective layer 202b which is provided in continuity on the base layer 202a over the total length in the rotational direction, opposite to the outer peripheral surface of an impression cylinder 100 that does not hold a sheet 1, over the total length in the axial direction thereof, and has about the same thickness as the sheet 1, and a reinforcement layer 202c which is provided on the protective layer 202b opposite to a notch part 100a of the impression cylinder 100. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid supply apparatus for supplying a liquid such as ink or varnish by a squeegee from a hole in a plate material such as a screen to a sheet-like material such as a sheet held by an impression cylinder, and performing printing, coating, etc. In particular, the present invention is effective when applied to a screen printing unit of a printing machine that performs screen printing on a sheet.

  Conventionally, when performing screen printing on a sheet, a rotary screen device in which a thin cylindrical screen having a small hole corresponding to a pattern is rotatably supported and a squeegee is disposed inside the screen is used. Liquids such as ink and varnish that correspond to the above pattern on the sheet held on the impression cylinder by extruding the liquid such as ink and varnish stored inside the screen from the small hole of the screen with a squeegee The screen is printed. For this reason, the rotary screen device can be printed on a sheet of paper with special ink or the like, so that it is applied when giving a high-class feeling to the appearance and the touch.

  When printing on a sheet using such a rotary screen device, for example, in the following Patent Document 1 or the like, the impression cylinder and the nail base are not projected from the outer peripheral surface of the impression cylinder. And a cover that can be opened and closed to cover the notch. When holding or opening the sheet, the cover also opens and closes in synchronization with the opening and closing operation of the gripper. In this way, the sheet can be held and released, and the screen is prevented from falling into the notch portion of the impression cylinder and from being in contact with the holding claw (projection). .

Special Table 2000-504643

  However, in the apparatus structure described in Patent Document 1 and the like as described above, since the squeegee urges the screen radially outward, the screen is on the surface of the impression cylinder from the surface of the sheet. At the time of transition, the sheet is suddenly pulled outward in the radial direction by the length t of the sheet, so that the screen is damaged and the life of the screen is shortened. It was.

  Such a problem is not limited to printing special ink on a sheet of paper. For example, when a varnish is applied to the entire surface of a sheet of paper, the sheet-like material held on the impression cylinder is rotated. If the liquid is supplied from the hole of the plate material of the screen device by the squeegee, it can occur in the same manner as described above.

  In view of the above, an object of the present invention is to provide a liquid supply apparatus provided with a plate material capable of reducing the damage at the time of liquid supply as much as possible and extending the life.

  In order to solve the above-described problems, a liquid supply apparatus according to the present invention includes a cylindrical plate member having a hole formed in a peripheral surface thereof, and the plate member so that the plate member is brought into contact with an impression cylinder. A pair of support members that support both ends and are rotatably supported, and a liquid that is disposed inside the plate material so as to contact the inner peripheral surface of the plate material and is stored inside the plate material In the liquid supply apparatus comprising a rotary screen device having a squeegee for supplying the sheet-like material held on the outer peripheral surface of the impression cylinder through the hole of the plate material, the sheet-like shape of the impression cylinder The rotary screen in which at least a part of the plate material of the rotary screen device facing the outer peripheral surface not holding the object faces the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder Part of the plate material of the device Characterized in that it becomes the thickness of the sheet added to the thickness of the thickness.

  Further, the liquid supply device according to the present invention is the above-described liquid supply device, wherein the plate material portion of the rotary screen device faces the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder. So that the thickness of the sheet-like material is continuously added over the entire length in the rotational direction facing the outer peripheral surface that does not hold the sheet-like material over the entire axial length of the impression cylinder. The plate material of the screen device is formed.

  In the liquid supply device according to the present invention, in the above-described liquid supply device, the portion of the plate material of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder may be The sheet-like material has a thickness that corresponds to the thickness of the plate member of the rotary screen device, which is formed of a base layer having holes formed on the surface, and that faces the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder. The thickness-added portion is characterized in that a protective layer having the thickness of the sheet-like material is provided on the base layer.

  Further, the liquid supply device according to the present invention is the above-described liquid supply device, wherein the impression cylinder includes sheet-like material holding means for holding the sheet-like material on the outer peripheral surface while holding the leading end side of the sheet-like material. In the notch formed on the outer peripheral surface so as to be installed, the sheet-like material holding means can hold the sheet-like material, while the end portion on the downstream side in the rotation direction of the notch and the upstream side A cover member that communicates with the end side is provided, and at least a part of the plate material of the rotary screen device facing the cover member of the impression cylinder is held on the outer peripheral surface of the impression cylinder The thickness of the plate material of the rotary screen device facing the surface of the sheet-like material, the thickness of the sheet-like material, the locus of the outer peripheral surface of the impression cylinder, and the surface of the cover member The thickness plus the length of the shortest distance Tsu, characterized in that is.

  Further, the liquid supply device according to the present invention is the above-described liquid supply device, wherein the plate material portion of the rotary screen device faces the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder. The thickness of the sheet-like material and the thickness of the outermost surface of the impression cylinder and the length of the shortest distance from the surface of the cover member are opposed to the notch of the impression cylinder. The plate material of the rotary screen device is formed so as to continuously cover the entire length in the rotating direction.

  In the liquid supply device according to the present invention, in the above-described liquid supply device, the portion of the plate material of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder may be The sheet-like material has a thickness that corresponds to the thickness of the plate member of the rotary screen device, which is formed of a base layer having holes formed on the surface, and that faces the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder. The thickness added portion is provided with a protective layer having the thickness of the sheet-like material on the base layer, and is opposed to the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder. The thickness of the plate material portion of the rotary screen device to which the thickness of the sheet-like material and the length of the shortest distance between the outer peripheral surface of the impression cylinder and the surface of the cover member are added Is the locus of the outer peripheral surface of the impression cylinder Characterized in that it is made of providing a reinforcing layer having a length thickness of the shortest distance between the surface of the cover member on the protective layer on the underlying layer.

  The liquid supply apparatus according to the present invention also supports a cylindrical plate material having a hole formed in the peripheral surface, and supports both ends of the plate material so that the plate material comes into contact with the impression cylinder and rotates. A pair of support members supported in a possible manner and an outer peripheral surface of the impression cylinder that is disposed inside the plate material so as to contact the inner peripheral surface of the plate material and is stored inside the plate material A liquid supply apparatus comprising a rotary screen device having a squeegee for supplying the sheet-like material held on the plate material through the hole, wherein the squeegee of the rotary screen device is in a radial direction of the plate material. The outer peripheral surface of the plate material of the rotary screen device is formed so as not to move along the surface.

  According to the liquid supply device of the present invention, at least a part of the plate material of the rotary screen device facing the outer peripheral surface that does not hold the sheet of the impression cylinder is held on the outer peripheral surface of the impression cylinder. Since the thickness of the portion of the plate material of the rotary screen device facing the surface of the sheet-like material is added to the thickness of the sheet-like material, the plate material is held on the outer peripheral surface of the impression cylinder. Even when moving from the sheet-like material to the outer peripheral surface of the impression cylinder, the squeegee can be prevented from falling onto the impression cylinder from the sheet-like material, so the plate material is suddenly pulled radially outward. Therefore, damage to the plate material can be greatly reduced, and the life of the plate material can be extended.

  Embodiments of a liquid supply apparatus according to the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

[First embodiment]
A first embodiment of a printing machine in which a liquid supply apparatus according to the present invention is applied to a screen printing unit will be described with reference to FIGS. 1 is an overall schematic configuration diagram of the printing machine, FIG. 2 is an enlarged enlarged view of a portion indicated by an arrow II in FIG. 1, FIG. 3 is an enlarged enlarged view of an essential portion of FIG. 2, and FIG. FIG. 5 is a sectional view in the axial direction of the main part of the rotary screen device of FIG. 2, FIG. 6 is a schematic configuration diagram of the screen manufacturing apparatus of FIG. 2, and FIG. 7 is the manufacturing of the screen of FIG. FIG. 8 is a procedure explanatory diagram subsequent to FIG. 7 of the screen manufacturing method of FIG. 2, and FIG. 9 is a procedure explanatory diagram subsequent to FIG. 8 of the screen manufacturing method.

  As shown in FIG. 1, the paper supply unit 10 is provided with a paper supply table 11. The paper feed unit 10 is provided with a feeder board 12 that feeds the sheet 1 as a sheet on the paper feed tray 11 to the printing unit 20 one by one. A swing device 13 is provided at the front end of the feeder board 12 to deliver the sheet 1 to the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20.

  A rubber drum 22a is in contact with the pressure drum 21a of the first offset printing unit 20a of the printing unit 20 on the downstream side of the swing device 13 in the rotational direction. A plate cylinder 23a is in contact with the pressure cylinder 21a of the rubber cylinder 22a on the upstream side in the rotation direction. An ink supply device 24a is provided on the upstream side of the plate cylinder 23a in the rotation direction from the rubber cylinder 22a. A water supply device 25a is provided on the upstream side of the plate cylinder 23a in the rotation direction from the ink supply device 24a.

  The pressure cylinder 21a of the first offset printing unit 20a is in contact with the pressure cylinder 21b of the second offset printing unit 20b via the transfer cylinder 26a on the downstream side in the rotation direction from the rubber cylinder 22a. Similar to the first offset printing unit 20a, the second offset printing unit 20b includes a rubber cylinder 22b, a plate cylinder 23b, an ink supply device 24b, a water supply device 25b, and the like.

  Further, the downstream side in the rotational direction of the rubber cylinder 22b of the pressure cylinder 21b of the second offset printing unit 20b is in contact with the pressure cylinder 21c of the third offset printing unit 20c via the transfer cylinder 26b. Similarly to the first and second offset printing units 20a and 20b, the third offset printing unit 20c also includes a rubber cylinder 22c, a plate cylinder 23c, an ink supply device 24c, a water supply device 25c, and the like.

  Further, the downstream side in the rotation direction of the rubber cylinder 22c of the impression cylinder 21c of the third offset printing unit 20c is in contact with the impression cylinder 21d of the fourth offset printing unit 20d via the transfer cylinder 26c. Similarly to the first to third offset printing units 20a to 20c, the fourth offset printing unit 20d includes a rubber cylinder 22d, a plate cylinder 23d, an ink supply device 24d, a water supply device 25d, and the like.

  As shown in FIGS. 1 and 2, on the downstream side of the rubber cylinder 22d of the impression cylinder 21d of the fourth offset printing unit 20d in the rotation direction, for example, air as described in Japanese Patent Application Laid-Open No. 2004-099314 or the like. The pressure drum of the screen printing unit 20e, which is a liquid supply device, passes through a transfer cylinder 26d composed of a skeleton cylinder (solid cylinder) disposed below the guide device 27a that guides the conveyance of the sheet 1 by blowing it. 100 are in contact with each other, and the impression cylinder 100 has the following structure.

  As shown in FIGS. 2 to 4, a plurality of notches 100 a along the axial direction of the impression cylinder 100 are formed on the outer circumferential surface of the impression cylinder 100 at regular intervals along the circumferential direction of the impression cylinder 100. In the embodiment, two places) are formed. From the outer peripheral surface of the impression cylinder 100 at the end of the notch 100a of the impression cylinder 100 on the upstream side in the rotation direction of the impression cylinder 100 (one side in the circumferential direction, the right side in FIG. 3 and the lower side in FIG. 4). Also, near the axial center of the impression cylinder 100, a plurality of claw bases 101 are provided at predetermined intervals along the axial direction of the impression cylinder 100.

  A claw shaft 102 is disposed in the notch 100a of the impression cylinder 100 so that the claw shaft 102 is oriented in the longitudinal direction along the axial center direction of the impression cylinder 100. The cylinder 100 is supported so as to be rotatable. A plurality of claws 103 are provided on the claw shaft 102 at predetermined intervals along the axial direction of the claw shaft 102 so that the tip side is positioned on the claw base 101.

  In other words, the impression cylinder 100 has an axial center and the claw base 101 with respect to the impression cylinders 21a to 21d, the transfer cylinders 26a to 26d, the transfer cylinder 26e, the conveyance cylinder 28, and the discharge cylinder 31 described later. The distance between the shafts and the outer peripheral surface is set to be the same, and the distance between the shaft center and the outer peripheral surface is set to be large so that the claw base 101 and the claw 103 do not protrude outward from the outer peripheral surface. The sheet 1 can be transferred between the sheet 1 and the front end side of the sheet 1 by the claw 103 or the like, and the sheet 1 can be held on the outer peripheral surface. It is.

  Further, in the notch 100 a of the impression cylinder 100, the gap between the downstream end and the upstream end in the notch 100 a is larger than the outer peripheral surface of the impression cylinder 100. A notch is formed so as to communicate at a position on the axial center side and to hold the front end side of the sheet 1 by the claw 103 or the like and to transfer the sheet 1 between the transfer cylinders 26d and 26e. A gap guard 105, which is an arc-shaped plate-shaped cover member formed with 105a, is fixedly attached.

  In FIG. 4, reference numeral 104 denotes a cam follower that rotates the claw shaft 102. In such an embodiment, the claw base 101, the claw shaft 102, the claw 103, and the like constitute sheet-like material holding means.

  As shown in FIGS. 1 to 3, a rotary screen device 200 is in contact with the impression cylinder 100 of the screen printing unit 20e on the downstream side in the rotational direction from the transfer cylinder 26d, and the rotary screen device 200 is It has the following structure.

  As shown in FIGS. 2, 3, and 5, cylindrical flanges 201a and 201b, which are support members that are rotatably supported, are cylindrical plates made of nickel having small holes formed on the peripheral surface according to the pattern. The end part of the screen 202 which is a material is supported. Inside the screen 202, an ink reservoir 203 for storing the special ink 2 that is a liquid, and the special ink 2 in the ink reservoir 203 is pushed out and supplied to the outside of the screen 202 through the small holes of the screen 202. A squeegee 204 is provided.

  As shown in FIGS. 3 and 5, the screen 202 includes a cylindrical base layer 202 a made of nickel in which a small hole corresponding to a pattern is formed on the peripheral surface, and the outer periphery of the impression cylinder 100. A square-shaped notch for fitting the sheet 1 so that the base layer 202a in which the small holes corresponding to the pattern are formed is brought into contact with the sheet 1 when facing the sheet 1 A cylindrical protective layer 202b made of nickel provided over the entire length in the circumferential direction on the base layer 202a so as to have a portion 202ba and substantially the same thickness t as the sheet 1; The trajectory of the outer peripheral surface of the impression cylinder 100 is provided on the protective layer 202b so as to roll over the gap guard 105 so as to cover the notch 100a when facing the notch 100a. gap It forms a three-layer structure of the reinforcement layer 202c formed of arc-shaped nickel having a length thickness of the shortest distance between the surface of the over de 105.

  In other words, the screen 202 has only the base layer 202 a as a portion facing the surface of the sheet 1 held on the outer peripheral surface of the impression cylinder 100, and the sheet paper extends over the entire axial length of the impression cylinder 100. The protective layer 202b is continuously provided over the entire length in the rotational direction on the base layer 202a facing the outer peripheral surface not holding 1, and the reinforcing layer is formed on the protective layer 202b facing the notch 100a of the impression cylinder 100. 202c is provided continuously over the entire length in the rotational direction.

  As shown in FIG. 1, air is blown out on the downstream side of the rotary screen device 200 of the impression cylinder 100 of the screen printing unit 20e in the rotational direction, for example, as described in Japanese Patent Application Laid-Open No. 2004-099314. A transfer cylinder 26e made of a skeleton cylinder (solid cylinder) disposed below is in contact with a guide device 27b for guiding the conveyance of the sheet 1. A conveyance cylinder 28 of the drying unit 20f is in contact with the transfer cylinder 26e on the downstream side in the rotation direction from the impression cylinder 100. A drying lamp 29 for irradiating ultraviolet rays (UV) is disposed on the downstream side in the rotation direction of the transfer drum 28 from the transfer drum 26e.

  A paper discharge drum 31 of the paper discharge unit 30 is in contact with the transport drum 28 of the drying unit 20f downstream of the drying lamp 29 in the rotation direction. A sprocket 32 is provided on the paper discharge drum 31 so as to be coaxially rotatable. The paper discharge unit 30 is provided with a paper discharge table 35. A sprocket 33 is provided above the paper discharge table 35. Between the sprockets 32 and 33, a paper discharge chain 34 having a plurality of paper discharge claws (not shown) attached at predetermined intervals is suspended.

  Here, a manufacturing apparatus for manufacturing the screen 202 having the above-described structure will be described.

  As shown in FIG. 6, the screen manufacturing apparatus 1000 includes an electroforming tank 1001 for storing an electroforming liquid 1010 made of an aqueous solution containing nickel ions, and an electrode plate made of nickel provided inside the electroforming tank 1001. 1002 and a copper-plated iron or copper-made cylindrical or columnar shape, that is, a mother surface having a cylindrical or columnar shape made of copper and a large number of minute dimples 1003a formed on the outer peripheral surface A mold 1003 (see FIG. 7A) and a driver that is disposed inside the electroforming tank 1001 so as to be movable up and down, supports the mother mold 1003 in a detachable manner, and rotates and drives the mother mold 1003. 1004 and a DC power supply device 1005 having a positive electrode connected to the electrode plate 1002 and a negative electrode connected to the driver 1004.

  Next, a manufacturing method for manufacturing the screen 202 using the screen manufacturing apparatus 1000 will be described.

  First, the dimple 1003a is closed with a hole masking material 1006 such as paraffin, resin, or tape so as to eliminate irregularities on the outer peripheral surface of the mother die 1003 (see FIG. 7B), and the mother die 1003 is sealed with the screen manufacturing apparatus. It is attached to 1000 drivers 1004 and immersed in the electroforming liquid 1010 in the electroforming tank 1001.

  Subsequently, when the DC power supply device 1005 is operated to energize between the electrode plate 1002 and the mother die 1003 and the mother die 1003 is driven and rotated by the driver 1004, nickel ions in the electroforming liquid 1010 are obtained. However, electrodeposition (plating) is performed on the outer peripheral surface of the mother die 1003 while avoiding the masking material 1006 on the outer peripheral surface of the mother die 1003. Thus, a base layer 202a (first nickel plating layer) made of cylindrical nickel having a large number of small holes 202d is formed (electroformed) on the outer peripheral surface of the mother die 1003 (see FIG. 7C) ( The basic layer electroforming process).

  When the base layer 202a is formed in this manner, the operation of the DC power supply device 1005 is stopped to stop energization between the electrode plate 1002 and the mother die 1003, and the driver 1004 is used to remove the mother die 1003. The rotational drive is stopped, and the mother die 1003 is pulled up from the electroforming liquid 1010 in the electroforming tank 1001. A first masking material 1007 (for example, gypsum, wooden mold, resin, tape, etc.) having a shape corresponding to the sheet 1 is placed on a predetermined portion of the surface of the base layer 202a on the outer peripheral surface of the master mold 1003. After providing at a predetermined position on the base layer 202a so as to expose only (a part) (see FIG. 8D), the master mold 1003 is again placed in the electroforming liquid 1010 in the electroforming tank 1001. Immerse.

  Subsequently, when the DC power supply device 1005 is operated to energize between the electrode plate 1002 and the mother die 1003 and the mother die 1003 is driven and rotated by the driver 1004, nickel ions in the electroforming liquid 1010 are produced. Further, electrodeposition (plating) is further performed on the base layer 202a avoiding the masking material for holes 1006 on the outer peripheral surface of the mother die 1003 and the first masking material 1007 on the base layer 202a. Thus, the sheet 1 is brought into contact with the base layer 202a when facing the surface of the sheet 1 having a large number of small holes 202d and held on the outer peripheral surface of the impression cylinder 100. A protective layer 202b (second nickel plating layer) made of cylindrical nickel having a square-shaped notch 202ba to be fitted and having substantially the same thickness t as the sheet 1 is provided on the base layer 202a. Are integrally formed (electroformed) (see FIG. 8E) (the protective layer electroforming step).

  When the protective layer 202b is formed in this way, the operation of the DC power supply device 1005 is stopped to stop energization between the electrode plate 1002 and the mother die 1003, and the mother die 1003 by the driver 1004 is stopped. Is stopped again, and the mother die 1003 is pulled up again from the electroforming liquid 1010 in the electroforming tank 1001. Then, a second masking material 1008 (for example, gypsum, wood mold, resin, etc.) having a shape corresponding to the notch 100a of the impression cylinder 100 is applied to a predetermined portion of the surface of the protective layer 202b. After providing at a predetermined position on the protective layer 202b so as to expose only (a part) (see FIG. 8F), the mother die 1003 is seen in the electroforming liquid 1010 in the electroforming tank 1001. Immerse every time.

  Subsequently, when the DC power supply device 1005 is operated to energize between the electrode plate 1002 and the mother die 1003 and the mother die 1003 is driven and rotated by the driver 1004, nickel ions in the electroforming liquid 1010 are produced. In addition, on the masking material 1006 for the hole on the outer peripheral surface of the mother die 1003 and the second masking material 1008 on the first masking material 1007 and the protective layer 202b, an electric current is further applied on the protective layer 202b. It will be worn (plated). As a result, the reinforcement made of arcuate nickel that has a large number of small holes 202d and rolls on the gap guard 105 covering the notches 100a when facing the notches 100a of the impression cylinder 100. A layer 202c (third nickel plating layer) is integrally formed (electroformed) on the protective layer 202b (see FIG. 8G) (the reinforcing layer electroforming step).

  When the reinforcing layer 202c is formed in this way, the operation of the DC power supply device 1005 is stopped to stop energization between the electrode plate 1002 and the mother die 1003, and the mother die by the driver 1004 is stopped. The rotation driving of 1003 is stopped and the mother die 1003 is pulled up from the electroforming liquid 1010 in the electroforming tank 1001. Then, after the driver 1004 is removed from the mother die 1003, the mother die 1003 and the masking materials 1007 and 1008 are removed, thereby producing (electroforming) a prototype of the screen 202 having many small holes 202d. (See FIG. 9 (h)).

  After the prototype of the screen 202 is manufactured in this manner, the photosensitive material 202e is provided on the outer peripheral surface of the screen 292 so as to block all the small holes 202d of the screen 202 with the photosensitive material 202e for plate making (see FIG. 9 (i)), the sheet 1 is fitted so that the sheet 1 is brought into contact with the base layer 202a when facing the sheet 1 held on the impression cylinder 100. By exposing the base layer 202a of the character-shaped notch 202ba portion with the target pattern and removing the portion of the photosensitive material 202e corresponding to the pattern (the pattern hole forming step), as described above. A screen 202 having a shape and structure can be manufactured.

  Next, the operation of the printing press according to this embodiment configured as described above will be described.

  While the sheet 1 sent out one by one from the sheet feeding table 11 of the sheet feeding unit 10 onto the feeder board 12 is transferred to the impression cylinder 21a of the first offset printing unit 20a of the printing unit 20 by the swing device 13, When ink and dampening water are supplied from the ink supply device 24a and the water supply device 25a of the first offset printing unit 20a to the plate cylinder 23a and then supplied from the plate cylinder 23a to the rubber cylinder 22a, the sheet 1 is converted into a rubber cylinder. After the ink is transferred from 22a and the first color is printed, the ink is transferred to the impression cylinder 21b of the second offset printing unit 20b through the transfer cylinder 26a, and, similar to the first offset printing unit 20a, In the second offset printing unit 20b, the second color is printed, and similarly, the third and fourth offset printing units 20c and 20d perform the third color printing. After having been subjected to printing of four-color eyes, are re added to the gripper pads 101 and the pawl 103 of the impression cylinder 100 of the screen printing unit 20e via the transfer cylinder 26 d.

  In the rotary screen device 200 of the screen printing unit 20e, the screen 202 rotates with the rotation of the impression cylinder 100, and the sheet 1 held on the outer peripheral surface of the impression cylinder 100 is the protection of the screen 202. The squeegee squeezes the special ink 2 in the ink reservoir 203 through the small hole 202d that fits into the notch 202ba of the layer 202b and corresponds to the pattern formed in the base layer 202a of the notch 202ba. By extruding with 204, the special ink 2 corresponding to the pattern is printed thickly on the sheet 1.

  At this time, the rotary screen device 200 has an outer peripheral surface in which the screen 202 has substantially the same thickness t as the sheet 1 and does not hold the sheet 1 over the entire axial length of the impression cylinder 100. Since the base layer 202a has the protective layer 202b continuous over the entire rotation direction on the base layer 202a facing each other, the squeegee 204 urging the screen 202 radially outward is provided on the impression cylinder 100. The squeegee 204 can be prevented from falling from the sheet 1 onto the impression cylinder 100 even when moving from the sheet 1 held on the outer circumference to the outer circumference of the impression cylinder 100. it can.

  For this reason, the rotary screen device 200 does not cause the screen 202 to be pulled suddenly outward in the radial direction, and damage to the screen 202 can be greatly reduced.

  Subsequently, the sheet 1 is transferred from the impression cylinder 100 to the transport cylinder 28 of the drying unit 20f through the transfer cylinder 26e, and the special ink 2 printed by the UV from the drying lamp 29 is applied. After being dried, the paper is transferred to the paper discharge drum 31 of the paper discharge unit 30, conveyed by the traveling movement of the paper discharge chain 34 through the paper discharge claw, and discharged onto the paper discharge tray 35.

  That is, in this embodiment, the outer peripheral surface of the screen 202 is formed so that the squeegee 204 of the rotary screen device 200 of the screen printing unit 20e does not move along the radial direction of the screen 202.

  For this reason, in this embodiment, it is possible to prevent the screen 202 of the rotary screen device 200 of the screen printing unit 20e from being suddenly pulled outward in the radial direction.

  Therefore, according to the present embodiment, damage to the screen 202 of the rotary screen device 200 of the screen printing unit 20e can be extremely reduced, so that the life of the screen 202 can be extended.

  The protective layer 202b of the screen 202 is radially outward when the screen 202 moves from the sheet 1 held on the outer peripheral surface of the impression cylinder 100 to the outer peripheral surface of the impression cylinder 100. It is only necessary to have a thickness t substantially the same as the thickness of the sheet 1 to the extent that the sheet 1 is not pulled suddenly.

  The screen 202 has a reinforcing layer 202c that is continuous over the entire length of the notch 100a in the rotational direction so as to cover the notch 100a when facing the notch 100a of the impression cylinder 100. 202b, the squeegee 204 is notched in the impression cylinder 100 when facing the notch 100a of the impression cylinder 100 even if the base layer 202a is thin. Since it can also be reliably prevented from falling into the portion 100a, the screen 202 can be further reliably prevented from being pulled suddenly outward in the radial direction, and damage to the screen 202 can be reduced. The life of the screen 202 can be further extended.

  The impression cylinder 100 has a gap guard 105 in the notch 100a, and the reinforcing layer 202c of the screen 202 rolls on the gap guard 105 so as to roll on the outer peripheral surface of the impression cylinder 100. Since it has a thickness that is the shortest distance between the locus and the surface of the gap guard 105, when the screen 202 faces the notch 100a of the impression cylinder 100, the squeegee 204 is Since it can prevent more reliably that it falls in the notch 100a of the impression cylinder 100, the screen 202 can be more reliably prevented from being pulled suddenly outward in the radial direction. Damage to the 202 can be reduced more reliably, and the life of the screen 202 can be extended more reliably.

  Moreover, since the screen 202 which integrally has the said each layers 202a-202c which consist of nickel is manufactured by electroforming in the electroforming liquid 1010 which consists of the aqueous solution containing nickel ion, the close_contact | adherence between each said layers 202a-202c Therefore, the life of the screen 202 can be further increased.

  Further, conventionally, when a sheet having a thickness t1 thicker than the thickness t is used, the thickness of the screen is shifted from above the notch portion of the impression cylinder to the surface of the sheet. Of the difference (t1−t) is suddenly pushed inward in the radial direction to receive an impact, and the screen is damaged, or a sheet t2 having a thickness t2 smaller than the thickness t is applied. When used, when the screen moves from above the notch of the impression cylinder onto the surface of the sheet, it is suddenly pulled radially outward by the length of the thickness difference (t−t2). Although the screen may be damaged due to impact, in this embodiment, it is possible to easily provide the protective layer 202b having substantially the same thickness as the various thickness sheets. A sheet having a thickness t1 thicker than the thickness t and a sheet having a thickness t2 thinner than the thickness t. Even so, when the screen 202 moves from above the notch 100a of the impression cylinder 100 onto the surface of the sheet, it is suddenly pushed inward in the radial direction by the length of the difference in thickness. It can be easily prevented from being received or suddenly pulled outward in the radial direction to receive an impact, and damage to the screen 202 can be reliably reduced.

[Other Embodiments]
In the first embodiment described above, the reinforcing layer is continuous over the entire length in the rotational direction of the notch 100a so as to cover the notch 100a when facing the notch 100a of the impression cylinder 100. Although the case of the screen 202 having a three-layer structure in which 202c is provided on the protective layer 202b has been described, as another embodiment, for example, as shown in FIG. 10, the reinforcing layer according to the first embodiment It is also possible to omit the 202c and to make a screen 212 having a two-layer structure including a base layer 212a having a thickness greater than that of the base layer 202a according to the first embodiment.

  Here, in the first embodiment described above, the shortest distance between the trajectory of the outer peripheral surface of the impression cylinder 100 and the surface of the gap guard 105 so as to roll the screen 202 on the gap guard 105. The reinforcing layer 202c having a length is applied, but in the other embodiments described above, a cover member is provided on the notch 100a so as to match the locus of the outer peripheral surface holding the sheet 1. By using the impression cylinder 110 provided with the gap guard 115, the screen 202 is rolled on the gap guard 115. In other words, in the first embodiment described above, the surface of the gap guard 105 (the guide surface of the screen 202) is provided in the notch 100a so as to be positioned radially inward from the outer peripheral surface of the impression cylinder 100. However, in the other embodiments described above, as shown in FIG. 10, the surface of the gap guard 115 (the guide surface of the screen 212) is made continuous with the outer peripheral surface with the same curvature as the outer peripheral surface of the impression cylinder 110. Thus, it is provided in the notch 100a.

  Such a screen 212 according to another embodiment described above is manufactured by the manufacturing process of the reinforcing layer 202c (the reinforcing layer electroforming process, FIG. Since it can manufacture by omitting f) and (g)), the effort concerning manufacture can be simplified and cost reduction can be achieved.

  However, since the thickness of the base layer 202a can be reduced in the screen 202 according to the first embodiment described above, it is very preferable because it is possible to easily perform thin printing.

  Further, in the above-described embodiment, the base layers 202a and 212a portions where the small holes 202d corresponding to the pattern are formed when facing the surface of the sheet 1 held on the outer peripheral surfaces of the impression cylinders 100 and 110. The case where the screens 202 and 212 including the cylindrical protective layer 202b formed with the square-shaped notch 202ba into which the sheet 1 is fitted so that the sheet 1 is brought into contact with the sheet 1 will be described. However, as another embodiment, for example, the base layer 202a formed with the small holes 202d corresponding to the pattern when facing the surface of the sheet 1 held on the outer peripheral surface of the impression cylinders 100, 110. It is also possible to apply a screen provided with a protective layer having a C-shaped cross section in which a cutout portion cut out along the entire length in the axial direction so as to bring the portion into contact with the sheet 1 is used. Base layer 202a that faces the axial direction over the entire length the sheet 1 the outer peripheral surface that does not retain the 00,110, is applicable as long as the protective layer provided on 212a only.

  Such a screen according to another embodiment described above is replaced with the first masking material 1007 having a shape corresponding to the sheet 1 in the method for manufacturing the screen 202 described in the first embodiment. By using the first masking material over the entire axial length of the screen, it can be manufactured in the same manner as in the first embodiment described above.

  Furthermore, without providing a protective layer over the entire length of the screen in the axial direction, a protective layer is provided only in a part of the screen in the axial direction. It is also possible to have only a layer.

  However, as in the above-described embodiment, the outer periphery of the impression cylinder 100 is the screens 202 and 212 including the cylindrical protective layer 202b formed with the square-shaped notch 202ba into which the sheet 1 is fitted. Since the screens 202 and 212 can be prevented from being bent in the axial direction when the special ink 2 is pushed out from the squeegee 204 to the surface of the sheet 1 held on the surface, the screen can be prevented. It is very preferable because deformation in the axial direction of 202 and 212 can be prevented, damage to the screens 202 and 212 can be further reduced, and the life of the screens 202 and 212 can be further extended. .

  In the above-described embodiment, the gap guards 105 and 115 are provided in the notches 100a of the impression cylinders 100 and 110. However, when the screens 202 and 212 have a sufficient thickness, the gap guards are provided. It is also possible to omit 105 and 115.

  In the above-described embodiment, the base layer 202a is electroformed and simultaneously formed with the small holes 202d by using the mother die 1003 in which a small number of dimples 1003a formed on the peripheral surface are closed with a hole masking material 1006. The screens 202 and 212 are manufactured by forming (mesh electroforming), closing the small holes 202d with the photosensitive material 202e for plate making, and exposing portions corresponding to the patterns. For example, by electroforming using a cylindrical or column-shaped matrix having no dimples on the peripheral surface, the prototypes of the screens 202 and 212 having no small holes are manufactured, and the small holes corresponding to the pattern are lasered. It is also possible to manufacture a screen by forming the base layer by machining, electric discharge machining, drilling or the like (pattern hole forming step).

  However, as in the above-described embodiment, the screens 202 and 212 are manufactured by closing the small holes 202d formed by mesh electroforming with the photosensitive material 202e for plate making and exposing portions corresponding to the pattern. After use, the photosensitive material 202e is removed by washing or the like, and then the small holes 202d are closed again with a new photosensitive material 202e to expose portions corresponding to a new pattern, thereby forming new screens 202 and 212. This is very preferable because it can be easily reused.

  In the above-described embodiment, the cylindrical screens 202 and 212 are manufactured by electroforming using the cylindrical or column-shaped mother die 1003. However, as another embodiment, for example, a flat plate It is also possible to manufacture a flat plate-shaped raw material by electroforming using a shaped mother die, and to manufacture a cylindrical screen by joining the ends so as to round the raw material. .

  However, if the cylindrical screens 202 and 212 are manufactured by electroforming using the cylindrical or columnar mother die 1003 as in the above-described embodiment, it can be easily manufactured. So very preferable.

  Further, in the above-described embodiment, a screen made of nickel having each of the above layers is manufactured by electroforming in an electroforming solution made of an aqueous solution containing nickel ions. It is also possible to manufacture a screen having each of the above layers made of metal such as copper or cobalt-nickel by electroforming in an electroforming solution made of an aqueous solution containing metal ions such as copper or cobalt-nickel. .

  However, when producing a screen having each of the above layers by electroforming in an electroforming liquid comprising an aqueous solution containing metal ions, the nickel aqueous solution containing nickel ions is used as in the embodiment described above. It is very preferable to produce a screen made of the above, because the adhesion (integration) between the layers can be greatly enhanced.

  In the above-described embodiment, the screens 202 and 212 are manufactured by electroforming in an electroforming solution made of an aqueous solution containing metal ions. However, as another embodiment, for example, a cylindrical shape is formed. Cut the raw material to produce a screen prototype, or cut the plate-shaped raw material and then join the ends to round the raw material to produce a cylindrical screen prototype In addition, the sleeve (protective layer) is fitted to both ends in the axial direction of the mesh-like cylindrical body (which becomes the base layer), and the sleeve of the cylindrical body is exposed so as to expose only the portion in contact with the sheet. It is also possible to manufacture a prototype of the screen by attaching a mount (protective layer) to a predetermined location on the outer peripheral surface between the two and further attaching a mount to a location facing the notch portion of the impression cylinder. .

  In the above-described embodiment, the case where the sheet-like object holding unit is configured by the claw base 101, the claw shaft 102, the claw 103, and the like has been described. However, as another embodiment, for example, Japanese Patent Application Laid-Open No. 2001-225445 A suction holder having a suction port on the surface thereof, a suction means connected to the suction holder, a suction holder, and a suction means Between the suction holder and the suction means when receiving the sheet-like material, and shuts off the suction holder and the suction means when delivering the sheet-like material. It is also possible to constitute the sheet-like object holding means by the suction holding means provided with the switching means.

  In the above-described embodiment, the case where the screen printing unit 20e and the drying unit 20f are disposed on the downstream side of the first to fourth offset printing units 20a to 20d has been described. As another embodiment, for example, FIG. As shown in FIG. 12, the screen printing unit 20e and the drying unit 20f are disposed upstream of the first to fourth offset printing units 20a to 20d, or the first and second offset printing units 20a, 20f, It is also possible to arrange a screen printing unit 20e and a drying unit 20f between 20b and the third and fourth offset printing units 20c, 20d.

  In the above-described embodiment, the case where the offset printing units 20a to 20d and the screen printing unit 20e are combined is described. However, as another embodiment, for example, as illustrated in FIG. There is no printing unit, and it may be applied to a screen printing machine including a paper feeding unit 10, a screen printing unit 20e, a drying unit 20f, and a paper discharging unit 30, or may be combined with a processing unit other than a printing unit such as a rotary punching machine. Is possible.

  Further, in the above-described embodiment, the special ink 2 is stored inside the screen 202 of the rotary screen device 200, and the special ink 2 is thickly printed on the sheet 1 by the squeegee 204 from the small hole of the screen 202. Although the case where it applied to the unit 20e was demonstrated, it is not restricted to this, For example, as a coating apparatus which puts a varnish inside the screen of a rotary screen apparatus, and coats a sheet with a squeegee from the small hole of the said screen As in the case of use, etc., if the liquid is supplied to the sheet-like material held by the impression cylinder from the hole of the plate material of the rotary screen device by the squeegee, the same as in the case of the above-described embodiment. Can be applied.

  In the liquid supply apparatus according to the present invention, the squeegee falls from the sheet-like material onto the impression cylinder even when the plate material moves from the sheet-like material held on the outer circumferential surface of the impression cylinder to the outer circumferential surface of the impression cylinder. For example, if it is applied to a screen printing unit of a printing press, special ink or the like by a squeegee from the hole of the screen of the rotary screen device to the surface of the sheet held on the outer peripheral surface of the impression cylinder Even when printing the screen, the screen will not be pulled suddenly outward in the radial direction, damage to the screen can be suppressed, and the life of the screen can be extended. It can be used beneficially.

It is the whole schematic block diagram of 1st embodiment of the printing machine which applied the liquid supply apparatus which concerns on this invention to the screen printing unit. It is the extraction enlarged view of the arrow II part of FIG. FIG. 3 is an enlarged view of the main part of FIG. 2. FIG. 3 is a plan view of the impression cylinder of FIG. 2. It is an axial sectional view of the principal part of the rotary screen device of FIG. It is a schematic block diagram of the manufacturing apparatus of the screen of FIG. It is procedure explanatory drawing of the manufacturing method of the screen of FIG. FIG. 8 is an explanatory diagram of a procedure subsequent to FIG. 7 of the method for manufacturing the screen of FIG. FIG. 9 is a procedure explanatory diagram subsequent to FIG. 8 of the method for manufacturing the screen of FIG. 2. It is a schematic block diagram of the principal part of other embodiment of the liquid supply apparatus which concerns on this invention. It is a whole schematic block diagram of other embodiment of the printing machine which applied the liquid supply apparatus which concerns on this invention to the screen printing unit. It is a whole schematic block diagram of other embodiment of the printing machine which applied the liquid supply apparatus which concerns on this invention to the screen printing unit. It is a whole schematic block diagram of other embodiment of the printing machine which applied the liquid supply apparatus which concerns on this invention to the screen printing unit.

Explanation of symbols

1 sheet of paper 2 special ink 10 paper feed unit 11 paper feed stand 12 feeder board 13 swing device 20 printing unit 20a-20d first to fourth offset printing unit 20e screen printing unit 20f drying unit 21a-21d impression cylinder 22a-22d rubber Cylinder 23a-23d Plate cylinder 24a-24d Ink supply device 25a-25d Water supply device 26a-26e Transfer cylinder 27a, 27b Guide device 28 Transport cylinder 29 Drying lamp 30 Paper discharge unit 31 Paper discharge cylinder 32, 33 Sprocket 34 Paper discharge chain 35 Discharge base 100, 110 Pressure drum 100a Notch 101 Claw base 102 Claw shaft 103 Claw 104 Cam follower 105, 115 Gap guard 105a Notch 200, 210 Rotary screen device 201a, 201b Flange 202, 212 202a, 212a Base layer 202b Protective layer 202ba Notch portion 202c Reinforcement layer 202d Small hole 202e Photosensitive material 203 Ink storage portion 204 Squeegee 1000 Screen manufacturing device 1001 Electroforming tank 1002 Electrode plate 1003 Master mold 1004 Driver 1005 DC power supply device 1006 Masking material for holes 1007 First masking material 1008 Second masking material 1010 Electroforming liquid

Claims (7)

A cylindrical plate material with holes formed in the peripheral surface;
A pair of support members that support both ends of the plate material so as to make the plate material come into contact with the impression cylinder and are rotatably supported;
The plate disposed on the inner side of the plate material so as to contact the inner peripheral surface of the plate material and stored in the plate material is held on the sheet-like material held on the outer peripheral surface of the impression cylinder. A liquid supply apparatus comprising a rotary screen device having a squeegee for supplying through the hole of the material,
At least a part of the plate material of the rotary screen device facing the outer peripheral surface of the impression cylinder that does not hold the sheet-like object is held on the outer peripheral surface of the impression cylinder. The liquid supply device, wherein the thickness of the plate material portion of the rotary screen device facing the surface is added to the thickness of the sheet-like material. In claim 1,
A portion having a thickness obtained by adding the thickness of the plate-like material to the thickness of the plate material portion of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder, The liquid supply, wherein the plate material of the rotary screen device is formed so as to continuously extend over the entire length in the rotational direction facing the outer peripheral surface not holding the sheet-like material over the entire axial length of the impression cylinder apparatus. In claim 1,
The portion of the plate material of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder is composed of a base layer in which holes are formed on the peripheral surface,
A portion having a thickness obtained by adding the thickness of the plate-like material to the thickness of the plate material portion of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder, A liquid supply apparatus, wherein a protective layer having a thickness of a sheet-like material is provided on the base layer. In claim 1,
In the notch portion formed on the outer peripheral surface, the impression cylinder is provided with a sheet-like holding member that holds the sheet-like material on the outer peripheral surface while holding the leading end side of the sheet-like material. A cover member that communicates between the end side on the downstream side in the rotation direction and the end side on the upstream side of the notch while allowing the sheet-like object to be held by the object holding means,
The rotary screen device in which at least a part of the plate material of the rotary screen device facing the cover member of the impression cylinder faces the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder. The thickness of the plate material part of the sheet is the thickness of the sheet-like material plus the length of the shortest distance between the trajectory of the outer peripheral surface of the impression cylinder and the surface of the cover member. A liquid supply device. In claim 4,
The thickness of the plate material of the rotary screen device facing the surface of the sheet-like material held on the outer circumferential surface of the impression cylinder, the thickness of the sheet-like material, and the locus of the outer circumferential surface of the impression cylinder And the surface of the cover member have a thickness that is the sum of the length of the shortest distance continuously over the entire length in the rotational direction facing the notch of the impression cylinder. A liquid supply apparatus in which a plate material is formed. In claim 4,
The portion of the plate material of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder is composed of a base layer in which holes are formed on the peripheral surface,
A portion having a thickness obtained by adding the thickness of the plate-like material to the thickness of the plate material portion of the rotary screen device facing the surface of the sheet-like material held on the outer peripheral surface of the impression cylinder, A protective layer having a sheet-like thickness is provided on the base layer,
The thickness of the plate material of the rotary screen device facing the surface of the sheet-like material held on the outer circumferential surface of the impression cylinder, the thickness of the sheet-like material, and the locus of the outer circumferential surface of the impression cylinder The reinforcing layer has a thickness that is the sum of the length of the shortest distance between the surface of the cover member and the surface of the cover member, the thickness of the shortest distance between the locus of the outer peripheral surface of the impression cylinder and the surface of the cover member Is provided on the protective layer on the base layer. A cylindrical plate material with holes formed in the peripheral surface;
A pair of support members that support both ends of the plate material so as to make the plate material come into contact with the impression cylinder and are rotatably supported;
The plate disposed on the inner side of the plate material so as to contact the inner peripheral surface of the plate material and stored in the plate material is held on the sheet-like material held on the outer peripheral surface of the impression cylinder. A liquid supply apparatus comprising a rotary screen device having a squeegee for supplying through the hole of the material,
An outer peripheral surface of the plate material of the rotary screen device is formed so that the squeegee of the rotary screen device does not move along the radial direction of the plate material.

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